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How long does pfizer vaccine takes effect after one shot?
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- ?Lv 71 week ago
According to this article, the Pfizer shot *(not really a vaccine) is 90% effective for up to three weeks: https://www.usnews.com/news/health-news/articles/2...
You'd get more and better responses if you move this question out of the photography section and into one that's more appropriate.
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